static void heapSort(MyFileArray arr, int n)
{
for (int i = n / 2 - 1; i >= 0; i--)
{
heapify(arr, n, i);
}
for (int i = n - 1; i >= 0; i--)
{
heapify(arr, i, 0);
}
}
public static void Test_File_Array_List_heap(int seed, ref Stopwatch watch)
{
int n = 30000;
string filename;
filename = @"mydataarray.dat";
MyFileArray heapFileArray = new MyFileArray(filename, n, seed);
using (heapFileArray.fs = new FileStream(filename, FileMode.Open, FileAccess.ReadWrite))
{
Console.WriteLine("\n HEAP FILE ARRAY \n");
// heapFileArray.Print(n);
var time = System.Diagnostics.Stopwatch.StartNew();
heapSort(heapFileArray, n);
time.Stop();
Console.WriteLine("Uztruko: {0}ms", time.Elapsed.TotalMilliseconds);
// heapFileArray.Print(n);
}
}
static void heapify(MyFileArray arr, int n, int i)
{
int largest = i;
int left = 2 * i + 1;
int right = 2 * i + 2;
if (left < n && arr[left].CompareTo(arr[largest]) > 0)
{
largest = left;
}
if (right < n && arr[right].CompareTo(arr[largest]) > 0)
{
largest = right;
}
if (largest != i)
{
arr.Swap(i, arr[i], largest, arr[largest]);
//var swap = arr[i];
//arr[i] = arr[largest];
//arr[largest] = swap;
heapify(arr, n, largest);
}
}